Pulley block



J. H. FLYNN PULLEY BLOCK Sept. 26, 1944.

2 Sheets-Sheet l Filed vMarch 30 1942 0,2 4 4. 8. 4.4. 4.4 DOA. N. 5 m N w 5 \M Mx, 4 Mw www E wf J w A,

ATTORNEY.

Patented Sept. 26, 1944 UNITED STATES PATENT OFFICE 2,359,027 PULLEY BLOCK John H. Flynn, cincinnati, ohio Application Mach so, 1942, seran No. 436,797

4 Claims. (o1. gt4- 192i The invention relates to. means particularly adapted toV prevent separation of pulley-block shells or cheeks from each other and for securing parts of pulley blocks in xed relation with each other.

In the past considerable inconvenience and cliioulty has been experienced by manufacturers of pulley blocks in securing the cheeks, or shells, separators, or partitions, and other parts of pulley blocks, in fixed relation with one another, and at the same time eliminating necessity of weakening parts of the pulley-block. In the conventional type of pulley-block, such as now in general use, bolts or pins are utilized to secure the pulley block body parts together. This structure necessitates drilling holes through the cheeks, or shells, and also through the separators or partitions for the purpose of receiving said bolts or pins. The drilled holesV weaken the complete structure of the block and'also considerable time and expense is required when constructing pulley blocks in this manner as jigs and other expensive equipment is required for drilling said holes and installing said pins or bolts.

Therefore, the important object of` the invention is to provide simple, eflcientand practical means adapted for utilization inA quickly and conveniently securing' the cheeks, or shells, and partitions or separators of pulley block bodies in xedV and stationary relation with' one anotheigj without sacrificing or weakening the normal tensile strength of the block body,A and other parts.

Other objects of the invention are to provide practical and economical means for enabling p'ersons, who desire t'ore'pair the pulley blocks, to quickly and conveniently disassemble and reassemble said blocks; and toprovide means to secure the pulley block parts in predetermined'fixed" position without necessityY of using bolts or pins in drilled holes. Y

Other objects of the invention will lloe apparent by reference to the drawings and hereinafter description.

The invention consists in the combination of the elements, arrangement of parts and in the details of the construction, as hereinafter claimed.

In the drawings:

Fig. 6 is a perspective view of the slotted tube or sl,eeve; .A Y, u Y,

Fig, '7 is a section taken on the line 'l-1 shown ming-a., f,

Fig. ,8 is a sectionalview of a modification of a 111s, 0r en .,and. Sleeves.. o

OFig. 9 is another modication of a lug, or ear, and sleeve; i w 4 l d M Fig. ,ldis another modification of a lug or ear,

andsleeve. ,l

Fig. 1l is a perspective View of a double sheave pulley block having the invention incorporated therevvitli;` A LEig. 12 is a Fig.u11; i 'l l Fig. 13 isK an edge elevational view of the double sheave pulleyblock shown in Fig. l1; and

Fig. 14 is Va. top viewA of the saine. A In the preferred construction of the invention I provide the pulley block l comprising the block bodyZ. The body blocky consists of the shells, cheeks or housing sections 3 and l having ,recesses `5 andy 6, in ltheir inner sides, in which is ,mounted the pulley wheel 1 rotatable uponl the spindle B having its ends mounted in the bear"- ings A9 and I0 in the shells 3 and 4l y Received between the shells and 4 is the U- shaped strap I'l Ahaving the legsfl2 and I3 resection takl'en on the line l2i2 in ceived in theslots If4 and l5` in the shells 3 and 4. The slots I'4-l`4 and I5'-l5 are aligned, andl the lower ends of thelegs l2 and I3i have the holes I6 and il, therein in which is received the pin VI8 for supporting. any suitable object or weight. In the legs l2 and I3 are the holes o r bearings i9 and 20A aligned with the bearings 9 and l0 and in which the spindle 8 is mounted.

Integrally formed Vwith the upper and lower ends 2l and 22 of the shell 3Aare the outwardly p airswof upwardlywand downwardly extending cylindrical lugs or ears 23and 24 and v25 and 26, respectively. Integrally formed with the upper and lower ends 2 l and 28 of the shell 4 are the pairs of upwardly and `downwardly extending cylindrical lugs or ears 29`and 30, and 3|- and 32.

The lears 23 and 29; A24 and 30; 25and 3|;.26 andv 32 arealigned with each other,.respectively,

and their` inner ends contact `each other, as shown` As will be hereinafter explained, the purpose of the ears 23, 29, 24, 30, 25, 3l, 26 and 32is1t0 receive a means to retain the inner ends of the various ears in contact with each other whereby the shells 3 and 4 are retained in xed position with each other and the various parts as .the

` strap Il, pulley wheel 1 are secured in assembled position as shown in Figs. 1, 2, 3 and 4.

For the purpose of securing the cheeks 3 and 4 in xed relation with each other, after the pulley wheel 1 is rotatedly mounted upon the spindle 8 and the strap Il is positioned between the shells 3 and 4, a slotted sleeve33 is slid over each of the pair of ears 23 and 29; 24 and 30; 25 and 3l; and 25 and 32. Formed on the ends 34 Vand 35 of the sleeves 33 are the lips 36. The lips 35, of the sleeves 33 are manually, or otherwise, bent inwardly and in close contact with the outer ends of the ears, as shown in Figs. 1, 2 and 3, whereby the innerends of the pairs of ears are retained in close Contact with each other thereby retaining the shells 3 and 4, pulley wheel 1, and strap Il in assembled position.

In Fig. 8 is shown a modification of the invention of which the inwardly extending teeth 31, formed on the inside of the sleeve'38 mesh with the teeth 39 and 40 formed on the outer surface of the ears 4l and 42 whereby the inner ends of the ears are retained in close contact with each other. The ears 23, 29, 24, 3i), 25, 3l, 2B and 32, shown in Figs. l Vto inclusive may be formed with the teeth 39 and 40 shown in Fig. 8 and the sleeves 33 may be substituted for the sleeves 38.

In Fig. 9 is shown another modification of the invention in which the ears 43 and 44 have formed on their outer surface the spaced apart ribs 45 and 46 which are received in the grooves 41 and 48 formed on the inside of the sleeve 49.

In Fig. isshown another modification of the invention in which Von one end of the ear 50 is formed a rib 5I, whose sides 52 are inclined outwardly and mesh with the groove 53 in the adjacent ear 54 whereby the inner ends of the ears 5l) and 54 are retained in close contact with each other. Thesleeve 55 received around the ears 50 and 54 retain the ears in a line position with each other. The sleeves 38, 49 and 55, respectively, referred to in the above 'paragraphs and shown in Figs. 8, 9, and 10 are forced onto theirrespective ears by suitable machines or by manually pounding them thereon by use of a suitable hammer.

In Fig. `1l is shown a double sheave pulley block 56 having the cheeks 3 and 4 separated from each other as by the partition 51 having formed on its upper end the outwardly extendingears 58 and 59 respectively, in alignment with .the ears` 23-29 and 24-3El. Formed on the lower end of the partition are the ears Vt!) and 6l aligned with the ears 25-3l, 26-32. The slotted sleeves 33 are slid over the respective ears and the lips 35 are bent inwardly for the purpose of retaining the cheeks 3 and 4 and the partition 51 in fixed relation with one another.

An advantage of the invention is that the parts of a pulley block may be quickly and conveniently assembled and retainedin fixed relation with one another without necessity of drilling holes in the block parts, whereby the tensile strength of the pulley block parts is notaffected, weakened or reduced.`

Another advantage of the invention is that when it is desired to disassemble the pulley block shown in Figs. l, 2, 3, 4, and 1l, for making repairs, or for other purposes it is necessary simply to slide the slotted tube or sleeve 33 from the ears or lugs and in the double sheave shown in Fig. 11 the partition 51, whereby the cheeks 3 and 4, may be manually forced from each other to permit removal of the pulley wheel or wheels 1, and the spindle on which the wheel or wheels are rotatably mounted.

It is, therefore, quite apparent that I have devised a simple efcient and practical device for the intended purpose of retaining the shells and other parts of pulley blocks in predetermined stationary or fixed relation to each other, and which may be utilized conveniently and economically. While I' have, in the present instance, shown and described preferred embodiments thereof, which will give in practice satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars. And the parts of the invention may be of any size and constructed of any materials deemed convenient and suitable for an article of this character, I wish to emphasize the fact that I desire to include in this application all equivalents and substitutes that may fairly be considered to come within the scope and purview of the inventori, as defined in the claims.

What I claim as new and desire to secure by Letters Patent is: Y

l. Arpulley block comprising a pair of shells, a pulley wheel rotatably mounted in fixed position between said shells, and a strap between said shells and in iixed position with respect to said wheel and shells, the upper ends of each of said shells having formed thereon a pair of spaced apart ears, said strap being between the ears of each shell, theV ears of said pair of ears on one said shell being aligned with the ears in the pair of ears on the other said shell, the inner ends of the pairs of ears being in contact with each other, a pair of sleeves received on the aligned ears, and means to retain said sleeves in iixed position on said ears.

Y 2. A pulley block comprising a pair of shells, a pulley wheel rotatably mounted between said shells, means to support said wheel in xed position with respect to said shells, and a strap between said shells, said means supporting said wheel in xed position with respect to said strap, the upper ends of each of said shells having formed thereon a pair of spaced apart'ears, said strap being between the ears of each shell, the ears of saidpair of ears on one said shell being aligned with the ears in the pair of ears on the other said shell, a pair of sleeves received on the aligned ears, and means to retain said sleeves in xed position on said ears. Y

3. A pulley block comprising a pair of shells, a pulley wheel rotatably mounted between the shells, a U-shape strap positioned between the shells, said wheel being positioned between the legs of said strap, and means to retain said wheel, shells and strap in vpredetermined positions, eaohof said shells having a pair of spaced apart ears thereon, said strap being positioned betweenthe ears of the Vrespectivepairs of ears, means on each of said pairs of ears for retaining said shells in lixed relation witheach other.

4. In a pulley block, a pair of cheeks having cylindrical ears integrally Yformed with their upper and lower ends, a partition `between said cheeks and having cylindrical ears integrally Yformed with its upper and lower ends and being JOHN H. 

